US38929A - Improvement in jaquard looms - Google Patents

Description

UNITED ASTATES PATENT OFFICE.

H. W. HENSEL AND L. D. VALEITON, OF PHILADELPHIA, PNNSYL VANIA,

ASSIGNOB T() H. W. HENSEL.

IMPROVEMENT IN JAQUAPLAD LOOMS. l'

Specification kforming part of Letters Patent No. 38,929, dated June 16, 1863; antedated May 23, 1862.

ToaZZ whom it may concern,.-

Be it known that we, H. W. HENSEL and L. D. VALETTON, ot' Philadelphia, Pennsylvania, have invented a new and useful Improvement in Looms; and we do hereby de-y clare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Our invention relates to an improvement in Jacquard and other looms for weaving coachlaces, braids, and other narraw fabrics, and our improvement consists in a sliding bar having a horizontal projection, and arranged on the lathe of the loom, and operating substantially as described hereinafter, so as to keep the warp-threads open while the reed is beating the weft-thread up into the fabric, and thereby insuring an even and uniform selvage.

In order to enable others skilled in the art to make and use our invention, we will now proceed todescribe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure l is a veitical section of a sufficient portion of -a loom to illustrate our improvement, Fig. 2, the same with the lathe in a position diifering from that shown in Fig. 2, and Figs. 3 and 4 are transverse vertical sections.

Similarletters refer to similar parts throughout the several views.

A and A represent portions of the opposite side frames of a loom for weaving coach lace, braiding, or other narrow fabrics; and B and B are standards secured to the said frames and connected together at the top by the crossbar C. The lathe of the loom is composed of being connected to the usual Jacquard apparatus by cords t. The shuttle, by means of which the weft-thread is passed between the open warp-threads, is similar to those usually employedin coach-lace looms, the construction and operation of such shuttles being too well known to those familiar with the art of weaving to need illustration or description.

At the back of the transverse beam F is a bar, H, arranged to slide horizontally in and to be guided by staples e e, secured tothe said beam, and to this sliding bar is secured what I term the retainer I, part of which consists of a horizontal projection, i, having a rounded end. A horizontal reciprocating motion is imparted to this sliding bar from any moving part of the loom by any appliances which will readily suggest themselves to an expert machinest, the motion being such that when the lathe has reached the limit of its backward movement, and the warp-threads have been opened by the Jacquard apparatus, the projecting portion of the retainer will occupy a position between the open warpthreads, and at the back of the reed, as seen in Fig. 4, the projection retaining this position until the reed has reached the limit of its forward movement, has beaten up the weft or shuttle thread, and added the latter vto the fabric. When the lathecommences its backward movement, however, the sliding bar is moved back, and the projection -z of the retainer withdrawn from between the warpthreads to the position shown in Fig. 3, so that it may present no obstruction to the crossing and reopening of the warp-thread by the Jacquard apparatus. The moment the warpthreads are opened to their full extent, however, and by the time the line the lathe again reaches the limit of its backward movement, the sliding bar H is moved forward and the projection again takes its place between the opened warp-threads, and, as before, retains this position until another weftthread is added to the fabric by the beating up o'f the lathe.

It is well known that in Jacquard and other looms the opened warp-threads begin to close before the lathe has reached the limit of its forward movement, the weft-thread having previously taken its place between the warp. threads. Owing to this the weft-thread, if it be of woolen or other comparatively rough ibers, is so confined between the warp-threads that it is not always drawn to its proper position by the shuttle, the friction of the weft against the closing warp-threads being such as to prevent the former from occupying the exact position required, a ragged looking and uneven selvage is consequently the result.

It will be readily seen that by the use of our abovedescribed improvement the Warpthreads remain open until the Weftthread is beaten up into the fabric, and consequently the latter thread remains loose between and is not pressed upon and unduly controlled by the Warp-threads, the weft-thread retaining its proper position as it is being beatrn up into the fabric.

The device is especially applicable to Jacquard and other looms for Weaving Worsted braids, the freedom of the Weftthread to oc- (upy its proper position insuring a perfect en l uniform selvage.

We claim as our invention and desire to secure by Letters Patent- 'lhe sliding bar E and the horizontal pro jection i. arranged on the lathe of a Jacquard loom in respect to the Warp-threads, substantially as set forth, for operating on the said Warp-threads in the manner and for the purpose specified.

In testimony whereof We have signed our naines to this specification in the presence of two subscribing witnesses.

H. W. HENSEL. L. D. VALETTON.

Witnesses:

HENRY HoWsoN, JOHN WHITE.

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